I found a solution!!! Just copy the files of this fix directly to the game folder for the game which isn't able to run anymore. Look at the description on the page that has the download available.http://enbdev.com/download.htm
This way I'm now able to run old DX9 games and even games that are using DX8 on my 1030GT.
And also you always need to install the last DirctX9 version which is from May 2010, cause since Win 7 DX9 is no more a part of the OP-system. Those are compatible with 64bit also. I have also additionally installed the DX9 pack from Sereby, the guy which made the AIO runtimes pack. This alone fixed all problems till the Geforce 600 series. For later Geforce you need also the above mentioned fix.